Re: [squid-users] TCP_HIT and TCP_MISS

Guillaume Chartrand wrote:
> I try the solution on the other post to increase file descriptor
> I have 4096 when I do a ulimit -n
> I recompile squid
> Here what I have when I run squid -v
> Squid Cache: Version 2.6.STABLE12
> configure options:
>

No configure options at all? The default (last I checked) did not allow
for support of aufs cache dirs.

> Here some cache.log when I restarted after recompile and few test
> 2008/03/18 09:02:46| Starting Squid Cache version 2.6.STABLE12 for i686-pc-linux-gnu...
> 2008/03/18 09:02:46| Process ID 10769
> 2008/03/18 09:02:46| With 4096 file descriptors available
> 2008/03/18 09:02:46| Using epoll for the IO loop
> 2008/03/18 09:02:46| Performing DNS Tests...
> 2008/03/18 09:02:46| Successful DNS name lookup tests...
> 2008/03/18 09:02:46| DNS Socket created at 0.0.0.0, port 32848, FD 5
> 2008/03/18 09:02:46| Adding nameserver 172.20.20.3 from /etc/resolv.conf
> 2008/03/18 09:02:46| helperOpenServers: Starting 10 'squidGuard' processes
> ...
> 2008/03/18 09:02:46| Unlinkd pipe opened on FD 20
> 2008/03/18 09:02:46| Swap maxSize 5120000 KB, estimated 393846 objects
> 2008/03/18 09:02:46| Target number of buckets: 19692
> 2008/03/18 09:02:46| Using 32768 Store buckets
> 2008/03/18 09:02:46| Max Mem size: 524288 KB
> 2008/03/18 09:02:46| Max Swap size: 5120000 KB
> 2008/03/18 09:02:46| Store logging disabled
> 2008/03/18 09:02:46| Rebuilding storage in /usr/local/squid/var/cache (CLEAN)
> 2008/03/18 09:02:46| Rebuilding storage in /usr/local/squid/var/cache2 (CLEAN)
> 2008/03/18 09:02:46| Using Least Load store dir selection
> 2008/03/18 09:02:46| Set Current Directory to /usr/local/squid/var/core
> 2008/03/18 09:02:46| Loaded Icons.
> 2008/03/18 09:02:46| Accepting transparently proxied HTTP connections at 0.0.0.0, port 3128, FD 23.
> 2008/03/18 09:02:46| Accepting ICP messages at 0.0.0.0, port 3130, FD 24.
> 2008/03/18 09:02:46| WCCP Disabled.
> 2008/03/18 09:02:46| Accepting WCCPv2 messages on port 2048, FD 25.
> 2008/03/18 09:02:46| Initialising all WCCPv2 lists
> 2008/03/18 09:02:46| Ready to serve requests.
> 2008/03/18 09:02:46| Store rebuilding is 3.9% complete
> 2008/03/18 09:02:49| Done reading /usr/local/squid/var/cache2 swaplog (97993 entries)
> 2008/03/18 09:02:49| Done reading /usr/local/squid/var/cache swaplog (104485 entries)
> 2008/03/18 09:02:49| Finished rebuilding storage from disk.
> 2008/03/18 09:02:49| 202478 Entries scanned
> 2008/03/18 09:02:49| 0 Invalid entries.
> 2008/03/18 09:02:49| 0 With invalid flags.
> 2008/03/18 09:02:49| 202478 Objects loaded.
> 2008/03/18 09:02:49| 0 Objects expired.
> 2008/03/18 09:02:49| 0 Objects cancelled.
> 2008/03/18 09:02:49| 0 Duplicate URLs purged.
> 2008/03/18 09:02:49| 0 Swapfile clashes avoided.
> 2008/03/18 09:02:49| Took 3.1 seconds (65621.5 objects/sec).
> 2008/03/18 09:02:49| Beginning Validation Procedure
> 2008/03/18 09:02:49| Completed Validation Procedure
> 2008/03/18 09:02:49| Validated 202478 Entries
> 2008/03/18 09:02:49| store_swap_size = 4606476k
> 2008/03/18 09:02:50| storeLateRelease: released 0 objects
> 2008/03/18 09:10:29| httpReadReply: Excess data from "POST http://login.live.com/login.srf?id=2&svc=mail&cbid=43577"
> 2008/03/18 09:11:01| NOTICE: no explicit transparent proxy support enabled. Assuming getsockname() works on intercepted conne
> ctions
> 2008/03/18 09:11:01| WARNING: Forwarding loop detected for:
> Client: 172.20.20.18 http_port: 172.20.20.18:3128
> GET http://172.20.20.18:3128/design/motherbd/software/ias/updates.htm HTTP/1.0
> Via: 1.0 squid.collanaud.qc.ca:3128 (squid/2.6.STABLE12)
> X-Forwarded-For: 172.21.132.93
> Host: 172.20.20.18:3128
> Cache-Control: max-age=259200
> Connection: keep-alive
>
>

So your router is intercepting Squid's traffic and redirecting it back
to Squid. That's not so good. In a big way.

> And here is some of my squid.conf
> # Squid normally listens to port 3128
> #http_port 3128
> http_port 3128 transparent
> #Default:
> # cache_mem 8 MB
> cache_mem 512 MB
> #Default:
> # maximum_object_size 4096 KB
> maximum_object_size 25600 KB#Default:
> cache_dir ufs /usr/local/squid/var/cache 2500 16 256 # this one is a symlink to another disk
>

A symlink, or is the other disk mounted here. No matter, but you should
probably be using aufs, which you will have to compile support for.

> cache_dir ufs /usr/local/squid/var/cache2 2500 16 256
>

So how much memory does this box have? You've dedicated about a GB of
RAM for Squid alone (512 cache_mem + (5GB of cache_dir * 0.1)).

> all the other option is default value and I have some config for wccp
>

And apparently some url_rewriters (unless those are implied by using
wccp...).

> Thank
>
> ----------------------------
> Guillaume Chartrand
> Technicien informatique
> Cégep régional de Lanaudière
> Centre administratif, Repentigny
> (450) 470-0911 poste 7218

Chris
Received on Thu Mar 20 2008 - 19:20:46 MDT